Example: Sulfacetamide degradation presents a pH-rate profile U-shaped. The first order constant in the pH independent zone (5-11) is 9 x 10-6 s-1 at 120° C. The activation energy is 22.9 kcal mol -1 at pH 7.4. Calculate the retest period at 25° C. R= 8,314 JK-¹mol-1 1 cal = 4,1868 J H₂N ZI

Example: Sulfacetamide degradation presents a pH-rate profile U-shaped. The first order constant in the pH independent zone (5-11) is 9 x 10-6 s-1 at 120° C. The activation energy is 22.9 kcal mol -1 at pH 7.4. Calculate the retest period at 25° C. R= 8,314 JK-¹mol-1 1 cal = 4,1868 J H₂N ZI

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter11: Chemical Kinetics: Rates Of Reactions

Section: Chapter Questions

Problem 83QRT

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Transcribed Image Text:Example: Sulfacetamide degradation presents a pH-rate profile U-shaped. The first order constant in the pH independent zone (5-11) is 9 x 10-6 s-1 at 120° C. The activation energy is 22.9 kcal mol -1 at pH 7.4. Calculate the retest period at 25° C. R= 8,314 JK-¹mol-1 1 cal = 4,1868 J H₂N ZI

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